What is the most interesting fish you have ever kept? I don't care if it's the plainest looking thing - I just want to hear about it's "personality!"
I've just recently started keeping female betta in a sorority and have really enjoyed watching them! One girl seems to get excited when she sees another female so she'll have a chance to display, but she always gets ignored or chased off. It's really funny.
Rams are great to watch. They establish territory and then have little arguments its fun to watch. When you get pairs the male will use his body to block other males from his girl. It's neat to watch the parents raise and protect there young. And rams can be kept with other fish.